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Diffstat (limited to 'engines/m4/saveload.cpp')
| -rw-r--r-- | engines/m4/saveload.cpp | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/engines/m4/saveload.cpp b/engines/m4/saveload.cpp new file mode 100644 index 0000000000..b46783ef4d --- /dev/null +++ b/engines/m4/saveload.cpp @@ -0,0 +1,168 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * $URL$ + * $Id$ + * + */ + +#include "common/file.h" +#include "common/savefile.h" + +#include "m4/m4.h" +#include "m4/saveload.h" +#include "m4/sprite.h" + +namespace M4 { + +const char *orionSavesList = "saves.dir"; + +SaveLoad::SaveLoad(M4Engine *vm) : _vm(vm) { + // For Orion Burger, check the existance of a 'saves.dir' file to determine whether to + // act exactly like the original. Otherwise, we'll use the ScummVM standard, where we'll + // keep all the data for a savegame in a single file + + Common::File file; + _emulateOriginal = file.exists(orionSavesList); +} + +const char *SaveLoad::generateSaveName(int slotNumber) { + static char buffer[15]; + + sprintf(buffer, _emulateOriginal ? "burg%.3d.sav" : "burger.%.3d", slotNumber); + return buffer; +} + +bool SaveLoad::hasSaves() { + // Return true if a savegame file exists for the first slot + + if (_emulateOriginal) { + Common::File f; + return f.exists(generateSaveName(1)); + + } else { + Common::ReadStream *f = _vm->saveManager()->openForLoading(generateSaveName(1)); + if (f == NULL) + return false; + + delete f; + return true; + } +} + +SaveGameList *SaveLoad::getSaves() { + SaveGameList *result = new SaveGameList(); + char saveName[MAX_SAVEGAME_NAME]; + Common::ReadStream *f = NULL; + + if (_emulateOriginal) { + Common::File *saveFile = new Common::File(); + saveFile->open(orionSavesList); + f = saveFile; + } + + for (int slotNumber = 1; slotNumber <= 99; ++slotNumber) { + if (_emulateOriginal) { + // Read in savegame name from save directory + bool isPresent = (f->readByte() != 0); + f->read(&saveName[0], MAX_SAVEGAME_NAME); + + if (isPresent) + result->push_back(Common::String(saveName)); + else { + result->push_back(Common::String()); + } + + } else { + // Read in savegame name from savegame files directly + Common::ReadStream *saveFile = _vm->saveManager()->openForLoading( + generateSaveName(slotNumber)); + if (!saveFile) { + // No savegame prsent at that slot + result->push_back(Common::String()); + } else { + // Skip over byte offset + assert(saveFile->readUint32LE() < 0x100); + + // Read in savegame name + saveFile->read(&saveName[0], MAX_SAVEGAME_NAME); + result->push_back(Common::String(saveName)); + + delete saveFile; + } + } + } + + if (_emulateOriginal) + delete f; + + return result; +} + +M4Surface *SaveLoad::getThumbnail(int slotNumber) { + Common::SeekableReadStream *saveFile; + uint32 dataOffset; + + if (_emulateOriginal) { + // Get savegame file from original game folder + Common::File *f = new Common::File(); + if (!f->open(generateSaveName(slotNumber))) { + delete f; + return NULL; + } + + saveFile = f; + } else { + // Open up savegame for access via savefile manager + saveFile = _vm->saveManager()->openForLoading(generateSaveName(slotNumber)); + } + if (!saveFile) + return NULL; + + dataOffset = saveFile->readUint32LE(); + assert(dataOffset < 0x100); + saveFile->seek(dataOffset, SEEK_CUR); + + // Read in the sprite data + + saveFile->seek(16, SEEK_CUR); + int width = saveFile->readUint32LE(); + int height = saveFile->readUint32LE(); + saveFile->seek(21, SEEK_CUR); + saveFile->readUint32LE(); // sprite data size + + M4Sprite *result = new M4Sprite(saveFile, 0, 0, width, height); + delete saveFile; + + return result; +} + +bool SaveLoad::load(int slotNumber) { + // TODO: Currently it's hardcoded to return a failure + return false; +} + +bool SaveLoad::save(int slotNumber, Common::String saveName) { + // TODO: Currently it's hardcoded to return a failure + return false; +} + + +} // End of namespace M4 |